Text Splitter & Merger

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Splits a single line of text into multiple lines by a chosen delimiter such as newline, tab, comma, space, slash, semicolon, or a custom character; or merges multiple lines into one line using a chosen separator

Introduction

The Text Splitter & Merger provides two operations in one tool. Split mode breaks a single line of text into multiple lines using a newline, tab, comma, space, slash, semicolon, or a custom delimiter of your choice. Merge mode does the reverse: it joins multiple lines into one line with any chosen separator. It is ideal for tidying pasted data, converting list formats, and cleaning exported content.

Using it is straightforward: pick Split or Merge, choose a delimiter (a custom delimiter accepts any character or string), paste your text, and click the button. Everything runs instantly in your browser with no waiting, and the result can be copied with a single click.

Technical Principles

The tool is built on classic string split and join algorithms. In split mode, the delimiter splits the input into an array of segments. Common delimiters (comma, tab, newline, and so on) map directly to their characters, while a custom delimiter is used verbatim. Each segment is then trimmed and empty segments are filtered out before the lines are joined back together with newline characters.

In merge mode, the input is first split into an array of lines using newline conventions (\n, \r\n, or \r). Every line is trimmed, blank lines are skipped, and the remaining lines are joined into a single line with the selected separator. Both modes preserve the original order and perform no encoding conversion, so multibyte text such as Chinese is handled safely.

Use Cases

  • Splitting a pasted single-line comma-separated list (IDs, tags) into multiple lines for easier review
  • Converting SQL IN clause parameters such as a,b,c into a one-item-per-line format
  • Merging multiline content (keywords, URL lists) into one line for emails, searches, or API requests
  • Handling data copied from spreadsheets with tab or space delimiters
  • Converting text in specific formats with custom delimiters such as | or #
  • Pairing with sorting and deduplication tools for batch data cleaning

Frequently Asked Questions

Q: Will splitting produce empty lines or extra whitespace?
A: No. During splitting, leading and trailing whitespace is removed from every segment, and empty segments caused by consecutive delimiters are filtered out, so every output line contains meaningful content.
Q: Does merging keep blank lines?
A: No. In merge mode the tool skips blank lines and joins only non-empty lines with the selected separator, preventing consecutive separators in the result.
Q: Can the custom delimiter be multiple characters?
A: Yes. The custom delimiter can be any character or string, such as |, ;, or --. It is matched and joined exactly as you enter it.

Typical Usage

Split: turn one comma-separated line into multiple lines

Input:

apple,banana,cherry,durian

Choose Split with the comma delimiter; output:

apple
banana
cherry
durian

Merge: join multiple lines into one line

Input:

HTTP 200
HTTP 301
HTTP 404

Choose Merge with the semicolon delimiter; output:

HTTP 200;HTTP 301;HTTP 404

Related Tools

The Text Splitter & Merger belongs to the text-processing category, together with Line Sorter, Text Deduplicator, Text Diff and Word Counter, and works well in data-cleaning workflows. After splitting, use Text Deduplicator to remove duplicate lines and Line Sorter to arrange the order.

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